Slide fasteners



A. BASHOVER SLIDE FASTENERS July 26, 1960 3 Sheets-Sheet 1 Original Filed June 9, 1950 FIG-2 INVENTOR. ALBERT BAEH V R PIE]. '5

3 Sheets-Shget 2 IN VEN TO'R.

ALBERT BAsHovcR A. BASHOVER sum: FASTENERS July 26, 1960 Original Filed June 9, 1950 y 1960 A. BASHOVER 2,946,109

SLIDE FASTENERS Original Filed June 9, 1950 3 Sheets-Sheet 3 INVENTOR. ALBERT BAiHOViR to be removed from the slide fastener.

trite States SLIDE FASTENERS Continuation of application Ser. No. 167,132, June 9, 1950. This application Feb. 19, 1953, Ser. No.

23 Claims. (Cl. 24-20515) The invention relates to sliders for slide fasteners of the type having spaced interlockable fastener elements, and more particularly to sliders of the so-called snag releasmg type.

There are times, usually due to the improper application of a slide fastener to an article such as a dress, that the material of the article becomes caught between the slider and the fastener elements of the slide fastener. It then becomes desirable to be able to simply and quickly release the caught material without ripping or otherwise damaging the fabric. The prior art has proposed various forms of so-called removable sliders to meet this problem. However, none of these prior art sliders have had any appreciable measure of commercial success.

In prior removable sliders of one kind, the wings are separately formed and hingedly connected to each other at the top or neck end by means of a pintle, which permits one wing to be moved with respect to the other. In this kind of slider, locking means is required to maintain the wings in the spaced relationship necessary for the sliders ordinary function of opening and closing of the fastener. Sliders of this kind are comparatively complieated in construction and are highly expensive to manufacture. Moreover, such sliders have not been adequate for the function which a slider must normally serve; namely, to properly engage and disengage the fastener elements of the slide fastener, or in other words to close and open the fastener while preventing disengagement of the fastener elements behind the slider. One highly critical dimension of a slider is the height of the channel. As soon as one'slider wing is movably or pivotally arranged with respect to the other, it is practically impossible to maintain this critical dimensiombecause of play or/and wear at the pivot, etc.

In another kind of removable slider, the wings are separately formed, but instead of hingedly connecting'the wings to each other, they are secured together by interlocking means which permits one wing to be entirely separated from the other. Even if the interlocking means could be made to suitably maintain the distance between the wings or the channel height, the manufacture of separate wings andthe means for interlocking them iscomplicated and costly.

In a further kind of removable slider, the wings are integrally connected to each other and formed of comparatively thin spring metal so that the wings are normally in the spread-apart condition permitting the slider A cam means is then provided to bring together the wings to normal working relation. Operationally, the primary objection to sliders of this kind is that the wings are movable vw'th respect to each other and therefore the internal channel height cannot be maintained suitably constant. Moreover, the cam wears, resulting in the slider opening when it is not desired that it open.

In still another kind of prior removable slider, the lower portion of the top wing is hingedly connected by a transversely disposed pintle to the upper portion of the Patented July 26, 1960 top wing, the upper portion of the top wing being integrally connected to the entire bottom wing. Sliders of this kind have not been satisfactory for the present purpose because material caught between the bottom wing and the integrally formed upper portion of the topwing is not released by moving away the hinged lower portion of the top wing. Another removable slider is formed in two halves separating longitudinally of the slider, with means for removably connecting such halves. Sliders of this kind having a separable neck or camming post do not function properly.

The primary object ofmy invention is to generally improve snag releasing sliders, and to provide such a slider which is based upon an entirely new principle. Unlike prior removable sliders, the wings are permanently and fixedly connected to each other so that the most critical dimension of the slider, the height of the Y-shaped channel, is maintained fixed and constant. The wings themselves are not relatively movable. wings may be rigidly connected in the same manner as in an ordinary slider. To impart the snag releasing function to the slider, the wings are made without the usual inturned flanges which complete the requisite Y-shaped channel. In accordance with a main feature and object of my invention, a separate member having a pair of inturned flanges is provided in addition to the flangeless slider body in order to complete the Y-shaped channel.

The separate member having the inturned flanges is so mounted upon the slider body that the flanges may be easily and simply retracted out of engagement with the fastener elements. When this is done material caught 'between the slider or its flanges, and the fastener elemore specific objects which will hereinafter appear, my

invention relates to the slider elements and their relation one to another as are hereinafter more particularly described in the following specification, and sought to be defined in the claims, The specification is accompanied by drawings in which:

Fig. 1 is a plan view of one form of slider of the present invention;

Fig. 2 is a longitudinal section taken approximately in the plane 2-2 of Fig. l;

Fig. 3 is a transverse section taken approximately in the plane of line 33, but omitting the slider actuating means and neck portion to simplify the illustration;

Fig. 4 is a plan view of the member providing .the inturned flanges;

Fig. 5 is a side elevation of the slider, showing how the flange-providing member may be retracted,

Fig. 6 is a view similar to Fig. 1, illustrating a second form of the'invention, wherein a flange-providing member is pivot-ally connected to the slider body; 7

Fig. 7 is a longitudinal section taken approximately in the plane of line 7'-7 of Fig. 6;

Fig.8 is a plan view of theflange-providing member Instead the slider Fig. 13 is a plan view of the slider body constituting a part of the slider shown in Figs. 11 and 12;

Fig. 14 is a plan view of the flange-providing member constituting another part of theslider shown in Figs. 11 and 12;

Fig. 15 is an end view of the flange-providing member shown in Fig. 14; and

Fig. 16 is a side elevation of the slider shown in Figs. 11 and 12 showing the manner in which the flangeproviding member is retracted.

This application is a continuation of my application Serial No. 167,132 filed June 9, 1950, now abandoned.

In all forms of the invention shown, the slider includes a slider body B and a flange-providing member F. The slider body B may be made in accordance with conventional slider manufacture practices, except for the omission of the usual inturned flanges. In my novel slider, the inturned flanges, instead of being formed integrally with the wings, are provided by the member F. The separately formed member F provides the surfaces for completing the internal Y-shaped channel of the slider, and is disposed upon one of the wings of the slider body for that purpose. However, the member F may be moved relative to or away from the body B in such a manner as to retract and eflectively eliminate the flanges, and thus allow the fastener elements to move out from within the slider body.

Referring now specifically to Fig. 3, a typical fastener is represented by tapes T having spaced interlocked fastener elements ;f with jaws j securing them to said tape. Referring now to Figs. 1 to 5 for one form of the invention, the slider body 33 comprises a top plate or wing 29 and a bottom plate or wing 22 permanently connected to each other at their upper ends by a so-called diamond or neck or post 24 in med spaced relationship. Preferably, the Wings 20, 22 and the post 24 are integrally formed. However, the wings may be welded or riveted together at the upper or neck end in strong permanent, fixed spaced relationship. The slider body may be made in accordance with usual manufacturing practices, such as by stamping, rolling, die casting or molding, and may be made of any suitable metal or plastic composition. Unlike the conventional slider, however, the inturned flanges which normally are formed along the longitudinal edges of the wings are omitted, so that the space between said wings provides tape slots which are too large for the slider to laterally retain the fastener elements.

The top wing is provided with a lug 26 to support means to permit the user to move the slider along the fastener. In the illustrated slider this is a finger piece or pull 28 of the pendant type. It will be understood, however, that any suitable means may be used which facilitates moving the slider along the fastener. The lug 26 preferably is formed integrally with the top wing 20 as is common practice in the art, but if desired, a separately formed lug may be riveted to the slider body. Also, the lug 26 is laterally indented in the usual fashion to provide laterally extending lug flanges 30, beneath which are received a pair of trunnions 32 oppositely disposed and extending from arms 34 formed at one end of the pull.

The member F, preferably formed as a stamping from a metal having resilient or spring-like qualities, is provided with a pair of inturned flanges 36 and 38 of sufficient width so that when the member F is disposed upon the slider body B, as shown in Figs. 1, 2 and 3, the slider will be provided with inturned flanges of desired width.

To suitably locate and maintain the member F upon the slider body B and yet permit releasing movement thereof with respect to the slider body, the member F is provided with a lug aperture 40 (Fig. 4) dimensioned to permit the lug 26 to pass therethrough. On each side of the aperture 40, a pair of transversely spaced, longitudinally extending, retaining elements 42 is provided, the ends of which are struck up to form resilient retaining bosses 44 (see Fig. 2). To insure the proper location of the member F upon the slider body B, the member F is provided with a tang 46, preferably formed by striking and excising the metal. The tang 46 is adapted to be received in a recess 48 formed in the slider body near the neck or post end thereof and substantially on a median line longitudinally of the slider body.

When the slider is in normal working condition, the positonal relationship of the parts is as shown in Figs. 1, 2 and 3. The inturned flanges 36 and 38 of the member F, in conjunction with the inside surfaces of the Wings 2 and 22 and the surfaces of the camming post 24 define the requisite Y-shaped channel. In other words, the member F places the inturned flanges 36 and 38 immediately outside the ends of the jaws of the fastener elements in position to laterally retain the fastener elements. It reduces the size of the tape slots to permit the slider to interlockably engage the fastener elements. The member F is pressed against the top Wing 20 by the pull trunnions 32 pivotally confined between, and bearing against, the lug flanges 3i) and the resilient retaining elements 44.

When it is desired to remove the slider, for example to release any material or fabric which has become caught between the fastener elements and the slider body or the flanges, the flanges 36 and 38 are retracted to the position shown in Fig. 5. To do this the slider is held with one hand, and with the other hand the pull 28 is moved in the direction of the arrow X in Fig. 2, whereupon the trunnions 32 are forced over the resilient retaining bosses 44. The pull 28 is then swung upwardly to the position shown in Fig. 5 to permit the member F with its inturned flanges to be retracted with respect to the slider body B. The transversely extending aperture below the bosses 44, designated 49 in Fig. 4, permits the member F to bypass the trunnions 32. However, the pull 28 is preferably shaped or dimensioned to prevent complete removal and possible loss of the member F. The snagged material can easily be released, because the removal of the flanges allows the fastener elements to be drawn laterally from between the laterally-unobstructed wings.

To restore the flanges to working position, the member F is pushed back onto the wing 29 and properly located thereon by having the tang 46 seat into the recess 48. Force is applied to the pull in a direction opposite to the direction of arrow X to return the pull trunnions over the bosses 44 and to the position shown in Figs. 1 and 2. To permit the pull to lie flat in the position shown in Fig. 2, the arms 34 are indented at to complement the curvature of the underlying bosses 44.

It is preferable to prevent the member F from becoming completely separated from the slider body B in handling, and suitable means may be provided for this purpose. In the present case the pull arms 34 are provided with a pair of transversely extending shoulders 50,

.formed by reducing the width of the pull along the arms 34. These shoulders may be formed at the same time that the pull is formed or stamped and does not require a separate operation. The member F is formed so that .the distance between the edges-52 and 54 (or, in other words, the overall length of the side-to-side slot 49 shown in Fig. 4) is less than the width of the main body of the pull, designated "w in Fig. 1, but greater than the distance between the outside edges 56 and 53 of the arms 34. Thus, when the member F is retracted from the slider body B, the shoulders 54 prevent its complete removal.

The form of the invention shown in Figs. 6 to 10 ditfers from that so far described mainly in that the flange-providing member F is pivotally connected to the slider body B. In this way the member F is permanently connected to the slider body B, and in both the working and retracted positions the proper positioning of the member F is always assured, and does not require undue manipulative effort on the part of the user.

The flange-providing member F is provided with a pair of spaced inturned flanges 60 and 62 so that when the member F is disposed upon the flangeless slider body B, as shown in Figs. 6 and 7, the slider will be provided with the desired flanges. The member F is provided with a lug aperture 64 (Fig. 8) dimensioned to permit the lug 26 (Fig. 1) to pass therethrough. On each side of the aperture 64 and approximately midway of the members length, a pair of resilient retaining bosses 66 (Figs. 8 and 9) are provided. The member F is formed with a pair of transversely spaced apertures 68, each below a retaining boss 66, and leading into the lug aperture 64. The member F is formed with a pair of inwardly directed journals 70 adapted to be received within bearings 72 (Figs. 7 and 10) formed in the vertical sides of wing 20 at the narrow end of the slider. As an alternative, the pivotal connection between the member F and the slider body B may be accomplished by simply indenting adjacent portions of the member F into pre-indented portions of the top wing 20 at the areas above indicated. In this form of the invention, the pull 29 does not require the formation of the shoulders 50 shown in Fig. 1, because the member F is permanently connected to the slider body B by the pivots.

When the slider is in normal working condition, the positional relationship of the parts is as shown in Figs. 6 and 7. The inturned flanges 60 and 62 of the member F, in conjunction with the inside surfaces of the wings 20 and 22 and the surfaces of the camming post 24 define the Y-shaped channel. The member F is pressed against the top wing 20 by the trunnions 32, which are pivotally confined between and bear against the lug flanges 30 and the main body of the member F.

When it is desired to release any material or fabric which has become caught between the fastener elements and the slider or its flanges, the flanges 6i) and 62 are retracted to the position shown in Fig. 10 To do this, the slider is held with one hand, and with the other hand the pull 29 is moved in the direction X in Fig. 7, whereupon the trunnions 32 are forced over the resilient retaining bosses 66. The pull 28 is then swung upwardly to a substantially vertical position, as shown in Fig. 5, to permit the member F to be pivoted upwardly to the position shown in Fig. 10. The apertures or slots 68 (Fig. 8) permit the trunnions 32 to pass therethrough as the member F is raised. To restore the flanges 6t) and 62 to normal working position, the converse of the described operations are followed.

The form of the invention shown in Figs. 11 to 16 differs from those already described mainly in that the slider is of the locking type. The slider is'made with a pull 74 having a locking pin 76. The flangeless slider body B is modified in several respects to make it adaptable for the pin-locking function. Instead of a comparatively long lug which permits longitudinal movement of the pull .trunnions, a short lug 78 is provided, for the pivotal axis of a pin-lock pull is preferably substantially fixed. The lug is laterally indented to provide flanges 8t and to receive therebeneath the trunnions 82- formed at the ends of arms 84 and the pull 74. The lug 78 isalso provided with a lip 86 (Fig. 16) forming a recess 88 for a purpose to be subsequently described.

In order to permit the pin 76 to engage the fastener elements within the channel of the slider, the top wing, designated 90 is provided with a window 94 (Figs. 13 and 16). The top wing 90 is not co-extensive with the bottom wing 92 to which it is rigidly connected by a neck or camming post 96. It has clearance to permit movement of the member F, as is later described. In order to economize in the use of the metal or plastic from which the slider is made, the clearance may be enlarged until the top wing has its flaring portions entirely omitted. The omitted portions are indicated by the corresponding portions, designated a in Fig. 13, of the bottom wing'92. Thus, the window 94, which ordinarily would be surrounded by slider material on four sides, may be open on one side.

The member F, as shown in Figs. 11, 12., 14, 15 and 16, is provided with the desired inturned flanges 98 and 100. It is formed with a large aperture 102 (Fig. 14)- into which extends a resilient retaining element 104. The retaining element extends along a median linein longitudinal direction, and is displaced upwardly from the horizontal plane of the member as shown in Fig.15. As in the previously described sliders,'the member F preferably is formed of a resilient material, so that element 104 will have spring-like qualities. The member F is provided with a pair of journals 106 adapted to be received within bearings 108 (Figs 12 and 13) formed in the vertical sides of the top wing 90. The journals may be made by a simple indenting operation. The bearings 108 are elongated to permit the journals to slide longitudinally therein. The member F .is permanently connected to the slider body B by means of the'described journal-bearing arrangement 106, 108. a

When the slider is in normal working condition, the positional relationship of the parts is as shown in Figs. 11 and 12. The inturned flanges 98 and 100 of the member F, in conjunction with the inside surfaces of the wings and 92 and the post 9 6 define the internal Y-shaped channel. The member F is pressed against the top wing 90 by the journals 106 at one end, and a portion, designated 110 (Fig. 12), of the member F which is received beneath lip 86 at the other end. The retaining element 104 bearing against lug 78 keeps the member F in locked position, that is, it keeps the part 110 beneath the lip $6. It should be noted that any reaction by the stringers against closing, bears against the flanges in downward direction and helps keep the member F in locked position.

When it is desired to release a fabric which has become snagged between the fastener elements and the slider, or its flanges, the inturned flanges 98 and are retracted to the position shown in Fig. 16. This is accomplished by moving the member F in the upward direction, shown by the arrow Y in Fig. 12, whereupon the portion is moved out from beneath the lip 86. This longitudinal movement of the member F is permitted by the elongated bearings 108 for the journals 106,'and the resilience of finger 104. As the member F is swung upwardly about the journals 106, the pull 74 is moved to the position shown in Fig. 16, the pull being disposed within the large aperture 102.

It will readily be apparent that while the slider illustrated in Figs. 11 to 16 has been shown and described as of the pin-locking type, it is within the scope of the invention to omit the pin on the pull, whereby the slider will be of the non-locking type. It is also within the scope of the invention to provide the slider with other types of locking means. For example, the pull 'may be provided with a cam or cams to engage the fastener elements. The flanges of the member F may be formed so that the slider will be of the so-called wing-locking type. Also, the slider body may be provided with suitable spring actuated locking means or so-called automatic lock."

It is believed that the construction and operation of my improved slider, as well as the advantagesthereof, will be apparent from the foregoing detailed description. By means of my novel slider, the most critical dimension of the slider, the height of the internal Y-shaped channel, is maintained fixed. This dimension is much more critical than the side-to-side spacing of the flanges, for example. The height must be maintained despite abuse in washing, wringing, ironing, etc., hence great strength and rigidity is needed to maintain the critical dimension. The construction of the slider which enables it to supply the snag releasing function is comparatively simple and does not detract from the strength of the slider for channel height, nor from its ability to freely and smoothly open and close the fastener, and to insure its being kept securely closed behind the slider.

It will be apparent that while I have shown and described my invention in several preferred forms, changes may be made in the structures shown without departing from the spirit of the invention as sought to be defined in the following claims.

I claim:

1. A slider for slide fasteners of the type comprising a pair of tapes having spaced, interlockable fastener elements with jaws securing them to said tapes, said slider comprising a body having a pair of spaced wings of substantially the same dimensions connected to each other at one end by a post in rigidly fixed spaced relationship to one another, the fastener elements of both tapes being received and being guided by said wings, said wings being so formed that a side of the body is provided with a tape slot which is too large to enable the body to laterally retain the fastener elements for interlockable engagement, and a member disposed upon and overlying one of the wings of said body and retractable with respect thereto in a direction transverse to the plane of the wing and member, said member having an inturned flange located outside the adjacent wing and extending toward the remote wing, said member in its down or normal fastener operating position reducing the size of the tape slot by placing the inturned flange immediately outside the ends of the jaws of the fastener elements in position to laterally retain the fastener elements and permit the slider to interlockably engage the fastener elements, said member in its retracted position acting to open up the tape slot to the extent that the slider will not laterally retain the fastener elements for interlockable engagement.

2. A slider as defined in claim 1, having additional releasable retaining means for releasably retaining said member in normal fastener operating position.

3. A slider as defined in claim 1, having additional means for releasably retaining said member in normal fastener operating position and for preventing complete separation of said member from said body when said member is released and is in retracted position, as well as when in operating position.

4. A slider as defined in claim 1, having a pull device secured to the slider body, and in which the pull device serves additionally as the means for releasably retaining said member in normal operating position.

5. A slider as defined in claim 4, in which the pull is so arranged that a change in position relative to the body to a position beyond the normal range of position assumed during normal operation of the slider serves to release said member.

6. A slider as defined in claim 1, wherein said member is pivotally connected to said slider body.

7. A slider as defined in claim 1, wherein a lug is provided on one of said wings, a pull having trunnions for connecting the pull to the lug, and means provided by said member cooperating with said trunnions for releasably retaining said member in normal fastener operating position.

8. A slider as defined in claim 1, wherein one of said wings is provided with a tug, said lug having a pull pivotally connected thereto, and said member being provided with retaining means cooperating with said parts of the slider to releasably retain the said member in normal fastener operating position.

9. A slider as defined in claim 1, wherein said member is pivotally connected to said body, said pivotal connection including slots aflording longitudinal movement of said member with respect to said body, and means operable in response to said longitudinal movement for releasably retaining said member in normal fastener operating position.

10. A removable slider for slide fasteners of the type comprising a pair of tapes having spaced, interlockable fastener elements with jaws securing them to said tapes, said slider comprising a body having a pair of spaced wings of substantially the same dimension connected to each other at one end by a post in rigidly fixed spaced relationship to one another, the fastener elements of both tapes being received and being guided by said wings, the space between said wings providing tape slots which are too large for the slider to laterally retain the fastener elements for interlockable engagement, and a member having a pair of inturned flanges, said member being disposed upon and overlying one of the wings of said body and retractable with respect thereto in a direction transverse to the plane of the wing and member, said flanges being located at the side edges of the member and extending in the same direction outside the adjacent wing toward the remote wing, said member in its down or normal fastener operating position reducing the size of the tape slots by placing the inturned flanges immediately outside the ends of the jaws of the fastener elements in position to laterally retain the fastener elements to permit the slider to interlockably engage the fastener elements, said member in its retracted position acting to open up the tape slots to the extent that the slider will not laterally retain the fastener elements for interlockable engagement.

11. A removable slider as defined in claim 10, having additional releasable retaining means for releasably retaining said member in normal fastener operating position.

12. A removable slider as defined in claim 10, having additional means for releasably retaining said member in normal fastener operating position and for preventing complete separation of said member from said body when said member is released and is in retracted position, as well as when in operating position.

13. A removable slider as defined in claim 10, having a pull device secured to the slider body, and in which the pull device serves additionally as the means for releasably retaining said member in normal operating position.

14. A removable slider as defined in claim 13, in which the pull is so arranged that a change in position relative to the body to a position beyond the normal range of position assumed during normal operation of the slider serves to release said member.

15. A removable slider as defined in claim 10, wherein said member is pivotally connected to said slider ody.

16. A removable slider as defined in claim 10, where in a lug is provided on one of said wings, a pull having trunnions for connecting the pull to the lug, and means provided by said member cooperating with said trunnions for releasably retaining said member in normal fastener operating position.

17. A removable slider as defined in claim 10, wherein one of said wings is provided with a lug, said lug having a pull pivotally connected thereto, and said memher being provided with retaining means cooperating with said parts of the slider to releasably retain the said member in normal fastener operating position.

18. A removable slider as defined in claim 10, wherein said member is pivotally connected to said body, said pivotal connection including slots affording longitudinal movement of said member with respect to said body, and means operable in response to said longitudinal movement for releasably retaining said member in normal fastener operating position.

19. A slider for slide fasteners comprising two elements having opposed substantially parallel guiding surfaces for guiding slide fastener members therebetween, means adjacent one end of said elements holding them in rigidly fixed spaced relation to one another, and a part associated with one of said elements and forming flanges directed towards the other element across the space between said elements, the element with which such part is associated being free of channel-forming flanges, there being a space between the edge of said flanges and the other element to provide guiding slots for a carrier for such members, said part being separate from the corresponding element, means movably mounting such part with respect to such element in such a way that the part can move in a direction to increase the space between the edge of the flanges and the other element, and means resiliently holding such part in a position in which the space between the edge of the flanges and the other element is less than the maximum possible space.

20. A slider for slide fasteners, said slider comprising two wings having opposed substantially parallel guiding surfaces for guiding slide fastener members therebetween, a neck at one end of said wings holding them in rigidly fixed spaced relation to one another, and a separate cover part overlying one of said wings and having flanges directed toward the more remote wing across the space between said wings, the adjacent wing which carries said cover part being free of channel-forming flanges, there being a space between the edge of said flanges and the remote wing to provide guide slots for the tapes carrying said fastener members, means movably mounting said cover part on said adjacent wing in such a way that the cover part can move in a direction away from the wings in order to increase the space between the flanges and the remote wing, and means resiliently holding said cover part against the adjacent wing in a position in which the space between the edge of the flanges and the remote wing is less than the maximum possible space.

21. A slider for slide fasteners, said slider comprising two wings having opposed substantially parallel guiding surfaces for guiding slide fastener members therebetween, a neck at one end of said wings holding them in rigidly fixed spaced relation to one another, and a separate cover part overlying one of said wings and having flanges directed toward the more remote wing across the space between said wings, the adjacent wing which carries said cover part being free of channel-forming flanges, there being a space between the edge of said flanges and the remote wing to provide guide slots for the tapes carrying said fastener members, means movably mounting said cover part on said adjacent wing in such a way that the cover part can move in a direction away from the wings in order to increase the space between the flanges and the remote wing, and means resiliently holding said cover part against the adjacent wing in a normal position in which the spacing between the edge of the flanges and the remote wing is the minimum available spacing desired during normal operation of the slider.

22. A slider for slide fasteners, said slider comprising two wings having opposed substantially parallel guiding 10 surfaces for guiding slide fastener members therebetween, a neck at one end of said wings holding them in rigidly fixed spaced relation to one another, a fixed outward anchor projection on one wing, and a separate cover part around said anchor projection and overlying said wing carrying said anchor, said cover part having flanges directed toward the more remote wing across the space between said wings, the anchor Wing carrying said cover part being free of channel-forming flanges, there being a space between the edge of said flanges and the remote wing to provide guide slots for the tapes carrying said fastener members, said cover part being movable on said anchor projection and wing in a direction away from the wings in order to increase the space between the flanges and the remote wing, and means resiliently holding said cover part against the anchor wing in a normal position in which the spacing between the edge of the flanges and the bottom wing is the minimum available spacing desired during normal operation of the slider.

23. A slider for slide fasteners, said slider comprising top and bottom wings having opposed substantially parallel guiding surfaces for guiding slide fastener members therebetween, a neck at one end of said wings holding them in rigidly fixed spaced relation to one another, a pull, a lug on said top wing for holding said pull, and a separate cover part overlying said top wing around said lug beneath said pull and having flanges directed toward the bottom wing across the space between said wings, the top wing being free of channel-forming flanges, said cover part being held on said top flange by said pull, there being a space between the edge of said flanges and the bottom wing to provide guide slots for the tapes carrying said fastener members, said cover part being movable on said top wing and lug in a direction away from the wings in order to increase the space between the flanges and the bottom wing, and means resiliently holding said cover part against the top wing in a normal position in which the spacing between the edge of the flanges and the bottom wing is the minimum available spacing desired during normal operation of the slider.

References Cited in the file of this patent UNITED STATES PATENTS 2,000,415 Pannutti May 7, 1935 2,090,124 Hossmann Aug. 17, 1937 2,526,653 Gerstman Oct. 24, 1950 

